Question

Which of the following is not in proportion to 3:2?

• A. 9:6
• B. 15:10
• C. 12:9
• D. 30:20

Answer 1

The correct option is C 12:9

a)
$\text{9:6 can be written as}\frac{9}{6}=\frac{3}{2}.\text{Hence, 9:6 is in proportion to 3:2.}$

b)
$\text{15:10 can be written as}\frac{15}{10}=\frac{3}{2}.\text{Hence, 15:10 is in proportion to 3:2.}$

c)
$\text{12:9 can be written as}\frac{12}{9}=\frac{4}{3}.\text{Hence, 12:9 is not in proportion to 3:2.}$

d)
$\text{30:20 can be written as}\frac{30}{20}=\frac{3}{2}.\text{Henec, 30:20 is in proportion to 3:2.}$